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Essex Field Club
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EFC Centre at Wat Tyler Country ParkWe are closed due to the Covid-19 situation, but we are otherwise normally open to the public at our centre at Wat Tyler Country Park every Saturday, Sunday and bank holiday 11am-4pm, check. We are also normally open on Wednesdays 10am-4pm.

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Noak Bridge road cutting, BASILDON, Basildon District, TQ69259024, General geological site

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Site category: London Clay, Claygate or Bagshot Beds

Noak Bridge road cutting


In 1983, road improvements at the Basildon exit of the A127 (Southend Arterial Road) revealed a small expanse of weathered, chocolate brown London Clay with a layer of septarian nodules. The nodules were notable as they contained fine crystals of barite (barium sulphate) in the cavities. Barite is not uncommon in London Clay septarian nodules (see entry for Southend Cliffs in Southend-on-Sea district) but the crystals from this site were particularly lustrous and translucent.

A group of 3.5 centimetre long barite crystals from a temporary exposure of London Clay at Basildon. Photo © G. Lucy


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Reference: G.Lucy (personal communication)

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